US5233264A - Electric incandescent lamp - Google Patents

Electric incandescent lamp Download PDF

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Publication number
US5233264A
US5233264A US07/540,232 US54023290A US5233264A US 5233264 A US5233264 A US 5233264A US 54023290 A US54023290 A US 54023290A US 5233264 A US5233264 A US 5233264A
Authority
US
United States
Prior art keywords
lamp
tags
bulb
pinch
incandescent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/540,232
Other languages
English (en)
Inventor
Helmut Tiesler
Wilfried Krings
Wilfried Emunds
Hermann Muller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
US Philips Corp
Original Assignee
US Philips Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
Assigned to U.S. PHILIPS CORPORATION reassignment U.S. PHILIPS CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: EMUNDS, WILFRIED, KRINGS, WILFRIED, MULLER, HERMANN, TIESLER, HELMUT
Application granted granted Critical
Publication of US5233264A publication Critical patent/US5233264A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/42—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp
    • H01K1/46—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp supported by a separate part, e.g. base, cap

Definitions

  • the invention relates to an electric incandescent lamp whose bulb has a glass pinch which is retained in a metal map cap with a rectangular cross-section, which cap is provided with outwardly bent tags at the wider sides of its end facing the bulb.
  • Such lamps are used, for example, as H1 and H3 motorcar lamps in motor vehicles in such a way that the lamp pinch lies with its wider sides in a horizontal plane.
  • the tags then have the function of cutting off the light radiated by the lamp coil to the rear through an angle of 90° ⁇ 24°, i.e. through an angle of 45° ⁇ 12° above and below the horizontal plane, respectively. In this way it is achieved that the rear section of the headlamp reflector, which contains an opening for accommodating the incandescent lamp, is not directly hit by the light from the incandescent coil.
  • H3 incandescent lamp of this type is known from DE-OS 26 05 433, corresponding to U.S. Pat. No. 4,122,367, where the tags extend at right angles to the lamp axis.
  • EP 02 35 855 A1 discloses and H1 incandescent lamp in which the tags run at an angle of approximately 45° to the lamp axis, adapting themselves basically to the more or less conical shape of the bulb end adjoining the pinch.
  • the tags are irradiated by the incandescent coil and reflect the light derived from the incandescent coil sideways onto narrowly delimited spatial sections of the headlamp reflector, from which sections it is reflected to the exterior, as undesired bright spots.
  • the present invention has for its object to provide an electric incandescent lamp whose tags provide rear shading through an angle of approximately 90°, but which prevents the bright spots from occuring.
  • tags each have at their free ends a rim which runs at least substantially parallel to the lamp axis.
  • the light incident from the incandescent coil on the tags is reflected several times, so that it loses intensity and is substantially reflected back to the incandescent coil itself. In this way, the bright spots are voided.
  • FIG. 1 shows a schematic diagram of a known H1 halogen incandescent lamp for motor vehicle headlamps with tags bent outward through approximately 70°;
  • FIG. 2 shows the H1 halogen incandescent lamp according to FIG. 1, of which the tags have rims which run parallel to the lamp axis;
  • FIG. 3 shows a schematic diagram of a known H3 halogen incandescent lamp for motor vehicle headlamps with tags bent outwards through 90°;
  • FIG. 4 shows the H3 halogen incandescent lamp according to FIG. 3 of which the tags have been provided with rims.
  • the lamps according to the FIGS. 1 and 2 have a bulb 1, made for example of quartz glass, whose a pinch 2 is held by a rectangular metal cap 3.
  • a prefocus ring 4 is mounted to the cap 3.
  • the reference numeral 5 refers to a connection contact.
  • An incandescent coil 6 is positioned in the lamp bulb 1, which coil extends in the direction of the lamp axis X--X.
  • a reflector 20, of which a portion is shown in FIG. 2, is provided with each of the lamps of FIGS. 1-4 for reflecting light from the coil to the exterior of the lamp.
  • the caps 3 of the lamps of FIGS. 1 and 2 are provided with outwardly bent tags at the wider sides 10 of their ends facing the bulb, which tags extend at an angle of approximately 70° relative to lamp axis X--X.
  • each tag 7 has at its free end a rim 9 which runs practically parallel to the lamp axis X--X.
  • the tags 7 with the respective rims 9 cut off the light radiated to the rear by the incandescent coil 6 through an angle of approximately 110° (broken line).
  • FIGS. 3 and 4 in which an H3 halogen incandescent lamp for motor vehicle headlamp reflectors is represented, corresponding parts have the same reference numerals as those in FIGS. 1 and 2.
  • the incandescent coil 6 is at right angles to the lamp axis X--X.
  • tags 11 At the wider sides 10 of the cap 3 are present tags 11 which engage in slots of prefocus ring 4.
  • FIG. 4 shows the free ends of these tags 8 bent through right angles, so that rims 9 are formed, which run practically parallel to the lamp axis X--X.
  • the tags 8 with their rims 9 cut off the light from the incandescent coil 6 through an angle of approximately 90° to the rear.
  • the light incident on the tags 8 is so reflected by the rims 9 that it is thrown back into the lamp bulb 1 (see the broken line indicating the radiation path in FIG. 4).
  • the rims 9 should run at least substantially parallel to lamp axis X--X, i.e. they may e.g. by directed slightly towards the lamp axis.

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
US07/540,232 1989-07-01 1990-06-19 Electric incandescent lamp Expired - Fee Related US5233264A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3921726A DE3921726A1 (de) 1989-07-01 1989-07-01 Elektrische gluehlampe
DE3921726 1989-07-01

Publications (1)

Publication Number Publication Date
US5233264A true US5233264A (en) 1993-08-03

Family

ID=6384132

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/540,232 Expired - Fee Related US5233264A (en) 1989-07-01 1990-06-19 Electric incandescent lamp

Country Status (4)

Country Link
US (1) US5233264A (US20050271598A1-20051208-C00001.png)
EP (1) EP0406938B1 (US20050271598A1-20051208-C00001.png)
JP (1) JP2546494Y2 (US20050271598A1-20051208-C00001.png)
DE (2) DE3921726A1 (US20050271598A1-20051208-C00001.png)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5359255A (en) * 1991-07-25 1994-10-25 Hamamatsu Photonics K.K. Discharge tube having a double-tube type structure

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4841736B2 (ja) * 2001-03-28 2011-12-21 ダイナゲイト株式会社 前部に突起部を備えた中底およびこの中底を備えた靴
DE102005011935A1 (de) * 2005-03-14 2006-09-21 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampe mit Abschaltungsvorrichtung
JP4982700B2 (ja) * 2008-04-23 2012-07-25 秀樹 中野 身体機能向上具

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3631379A (en) * 1969-05-23 1971-12-28 Audrey M Wright Incandescent filament lamps
US3898506A (en) * 1969-05-23 1975-08-05 Thorn Electrical Ind Ltd Incandescent filament lamps
US4485326A (en) * 1979-10-10 1984-11-27 U.S. Philips Corporation Electric lamp with a sleeve-shaped cap
US4703401A (en) * 1985-12-23 1987-10-27 Stanley Electric Co., Ltd. Head lamp for automobiles
US4883434A (en) * 1988-10-07 1989-11-28 Stanley Electric Co., Ltd. Wedge-base lamp and socket assembly

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1520799A (en) * 1975-11-25 1978-08-09 Thorn Electrical Ind Ltd Lamps
DE2605433C3 (de) * 1976-02-12 1979-01-25 Philips Patentverwaltung Gmbh, 2000 Hamburg Elektrische Glühlampe mit Zentrierring
JPS5836125Y2 (ja) * 1980-05-17 1983-08-15 高田器械株式会社 ハロゲンランプ口金
JPS60192360U (ja) * 1984-05-30 1985-12-20 スタンレー電気株式会社 口金に対するバルブの取付構造
FR2595006B1 (fr) * 1986-02-25 1988-05-06 Philips Eclairage Lampe a incandescence electrique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3631379A (en) * 1969-05-23 1971-12-28 Audrey M Wright Incandescent filament lamps
US3898506A (en) * 1969-05-23 1975-08-05 Thorn Electrical Ind Ltd Incandescent filament lamps
US4485326A (en) * 1979-10-10 1984-11-27 U.S. Philips Corporation Electric lamp with a sleeve-shaped cap
US4703401A (en) * 1985-12-23 1987-10-27 Stanley Electric Co., Ltd. Head lamp for automobiles
US4883434A (en) * 1988-10-07 1989-11-28 Stanley Electric Co., Ltd. Wedge-base lamp and socket assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5359255A (en) * 1991-07-25 1994-10-25 Hamamatsu Photonics K.K. Discharge tube having a double-tube type structure

Also Published As

Publication number Publication date
EP0406938A2 (en) 1991-01-09
JP2546494Y2 (ja) 1997-09-03
EP0406938B1 (en) 1995-08-30
DE69021963T2 (de) 1996-04-25
EP0406938A3 (en) 1991-08-07
DE3921726A1 (de) 1991-01-10
JPH0319250U (US20050271598A1-20051208-C00001.png) 1991-02-26
DE69021963D1 (de) 1995-10-05

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Legal Events

Date Code Title Description
AS Assignment

Owner name: U.S. PHILIPS CORPORATION, NEW YORK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:TIESLER, HELMUT;KRINGS, WILFRIED;EMUNDS, WILFRIED;AND OTHERS;REEL/FRAME:005467/0202

Effective date: 19900920

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Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

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Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20050803